Originally Posted by
cmulder
the leo engine sold cheap by hobbyking at the time.
That leo is a canidate for the fuel regulator system because the carburator on it isnt on of the best (lean mid range?)
I'll tell you one better: Those LEO's were internally copies of the OS SF series, and the piston/liner sets were sought after to replace OS OEM Nickel scrap.
So if you find a same size OS SF, transplant the piston/liner of the LEO (if it is still good) and you'll have a TRUE ABC OS...